Connecting head for multiple telephone and other circuits



Aug. 28, 1923. 1 4 5 F. G. BROCKETT ET AL CONNECTING HEAD FOR MULTIPLETELEPHONE AND OTHER CIRCUITS Filed April 5, 1922 Z5 INVENTOR; fig WWfimasa; 9 I' ATTORNEY,

ra /M Patented Aug. 28, 1923 lTED s'r 1,466,351 ATENT oFFeE.

FREDERICK G. BROCKETT AND CLIFTON C. WRIGHT, OF CHICAGO, ILLINOIS; SAIDBROCKETT ASSIGNOB TO.SAID WRIGHT.

CONNECTING HEAD MULTIPLE TELEPHONE AND OTHER CIRCUITS,

I Application filed. April 5,

To all whom it may concern:

Be it known that-we, FREDERICK G; BROO- nnr'r and CLIFTON C. WRIGHT,citizens of the United States, residing at Chicago, county of Cook, andState of Illinois, have inrented a certain new and useful Improvement inConnecting Heads for Multiple Telephone and Other Circuits, and declarethe following to be a full, clear, and exact description of the same,such as w ll enable others skilled in the art to which it pertains tomake and use the same, reference being had to the accompanyin drawings,which form a part of this specification.

When receiving in wireless telephone systems it is necessary, in orderto permit several persons to listen, that each person be provided with aseparate head-piece or that a loud speaking instrument be employed. Thepresent devices for connecting a plurality of head-pieces to the jackare clumsy and expensive. The object of the present invention is toproduce a simple, novel and inexpensive device adapted to connect anydesired number of to a wireless telephone receiving apparatus or otherapparatus or system.

The various features of novelty whereby our invention is characterizedwill hereinafter be pointed out with particularity in the claims; but,for our invention and of its objects and advantage's, reference may behad to the following detailed description taken in connection with theaccompanying drawing, wherein Figure 1 is a view showing in sideelevation acommon form of jack and in section one of our improved headswhich serves also as a support for the jack;

Fig. 2 is a front view of the head with the front plate and the hollowcentral post rembved, a modified. arrangement of holes being shown; and

Fig. 3 is a central longitudinal section of a jack plug carrying one ofour improve connecting heads.

Referring to Figs. 1 and 2 of the drawing, 1 represents a block ofinsulating material, preferably in the. form of a short cylinder havingone end gradually reduced in diameter, frustum of a cone. In the twoends of the member 1 are annular grooves 3 and 4, re spectively, thegreatest diameter of each .groove bemgonly slightly less than theexreceivers or head-pieces a full understanding of as indicated at 2, toform a 1922. Serial No. 549,789.

ternal diameter of the corresponding end of the block. In each roovelies a ring of conducting material, t e rings being indicated at 5 and6. These rings are preferably made yieldable and resilient. Thesecharacteristics may conveniently be secured by making each ring out of along helical coil of spring wire bent into the The rings are held in therooves by means of metal discs 7 and 8 p acd against the ends of theblocks and each having a diameter sufficient to permit it to cover thecol"- responding ring. Extending diagonally into the block throu h theconical face thereof are two sets of Tioles 9 and 10; the holes 9 beingso drilled that a portion of the ring 5 will project into ,each of thesame; and the holes 10 being so drilled that the ring 6 will projectslightly into each of these holes. The result is that when a contactpiece of a size to fit one of these holes is inserted into the same-itwill strike the corresponding ring, pressing the adjacent coils form ofa circle.

apart and making a sliding connection there-,

with as the contact piece is pushed farther in; thus insuring a goodelectrical connection between the contact piece and the ring. In theillustration two contact pieces 11 and 12 are shown inserted in theblock, the contact. piece 11 engaging with the ring 5 and the contactpiece 12 engaging with the ring 6.

Suitable means are provided for connecting the rings 5 and 6' to theleading-in wires." The plates 7 and 8 engage with the res ective rings 5and 6 and serve as parts of the circuits. In the arrangement shown inFigs. 1 and 2, the block is provided with an axial opening 13 a stud 14having on its outer end a head 15 which engages with the plate 8. Theinner end of the stud is screw threaded as indicated at 16, this portionbeing screwed into the stationary member 17 of a suitable jack. Ametallic rod 18 is fastened to the plate 7 and is electrically connectedin any suitable way as, for example, by means of a flexible wire 19, tothe movable member 20 of the jack. It will thus be seen that current canflow from the member 17 of thej aok through the stud 14 and plate 8 tothe ring 6 and from the member20 of the jack through the wire 19, member18 and plate 7 to the ring 5. The member 14 may be provided with anopening, extending axially through the same so that, if desired, anysuitable jackv through which passes.

plug may be inserted through the stud and into engagement with themovable member or finger of the jack.

In Fig. 3 we have shown the device as taking the form of a jack plug,All the parts of the head are the same as in the arrangement previouslydescribed excepting that the block is fixed on a suitable stem adaptedto be inserted into a jack. In the arrangement shown, the stemcomprises] a rod 22 of conducting material extendin entirely through theblock and having a head or button 23 screwed on the front end therei of.Around that portion of. the rod which lies behind the block, and alsoextending partway through the block, is a sleeve 24 of insulatingmaterial. Surrounding the sleeve 24- is a metallic sleeve 25 on Whichisfixed a metal collar 26 adapted to engage with the rear plate 7 of thehead. The block and the two plates at the ends thereof are clampedbetween the nut or button 23 and the collar 26.. The extreme rear end ofthe rod projects beyond the rear ends of the sleeves and is providedwith a knob or ball 27 which is adapted to complete the connectionthrough one side of the line while the sleeve 25 completes theconnection through the other side of the line when the plug is insertedinto a jack.

It will thus "be seen that we have produced a simple and novel devicecomposed of a few inexpensive parts readily assembled and readily takenapart, which will permit any desired number of leads to be connected toa pair of terminals or lcading-inwires. So

till

far as concerns the specific embodiments of our invention which we haveillustrated, it will be seen that we have produced simple, cheap devicesadapted to connect any desired head pieces to the jack ofa wireless telehone,

\V lhile we have illustrated and described with particularity only asingle preferred form of our invention, we do not desire to be limitedto the-exact structural details thus illustrated and described; butintend to cover all forms and arrangements which come within the termsemployed in the nitions of our invention constituting the appendedclaims.

l/Ve claim:

1. A device of the character described, comprising ahead of insulatingmaterial provided with outwardly-opening annular grooves in oppositeends thereof, a yield-' able resilient ring lying in each of saidgrooves, plates of conducting material lying against the ends of saidhead in contact with said rings, a rod extending through said head, saidrod being electrically connected to one of said plates and insulatedfrom the other plate, a sleeve surroundin and insulated from said rodand electrics ly connected to the latter plate,

racassi means on said rod and on said sleeve acting to clamp the platesagainst said head, said head having therein two series of holes eacharran ed adjacent to one of said rings,

2. device of the character describw, comprising a head of insulatingmaterial provided with outwardly-openin annular grooves in opposite endsthereoi, a yielding resilient ring lying in each grooves, metalplateslying against the ends of said head in. contact with saidrings, aclamping device holding said plates and said head together, saidclamping device including two parts insulated from each other and each.electrically connected to one of said plates to form two terminals.

3. A device of the character described, comprising a block of insulatingmaterial having an annular groove in each end thereof, a yieldahleresilient ring of conducting material arranged in each groove, a metalplate lying against each end of said block and engaging with thecorresponding ring, said block having in the sides thereof two sets ofhole to receive detachable contact pieces, the holes of one set being sodisposed that contact pieces therein will engagewith oneof said rings,and the holes of the other set being so disposed that contact piecestherein will engage the other of said rings. 1

4. A device of the character described, comprising a block of insulatingmaterial having an annular groove in each end thereof, a yieldableresilient ring of conducting material arranged in each groove, a metalplate lying against each end of said block and engaging with thecorresponding ring, said block having in the sides thereof two sets ofholes to receive detachable contact pieces, the holes of one set beingso disposed that contact pieces therein will engage with one of saidrings, the holes of the otherset being so disposed that contact piecestherein will engage the other of said rings, and a clamping device forholding said plates on the block and forming an electrical connectionwith One of said plates.

5. In adevice of the character described, a. block of insulatingmaterial having an annular groove therein, a helical coil of spring wirebent into the form of a ring and lying in said groove, and a plate ofconducting material overlying said groove and engaging with said ringand constituting one terminal therefor, said block hav ing therein. aplurality of holes for the reception of detachable contact pieces, saidholes being so disposed that contact pieces therein are yieldinglyengaged by said ring.

lln testimony whereof, we sign this specification.

rnnnnnion o. nnocnnrr. opinion 0. wnion'r.

of said till

